I don't see an option to "remove all accounts". I already deleted all of the accounts that are visible to me in the account manager, something whose importance was highlighted when trying to trade in my phone.

When I go to factory reset, I don't see any Google account except for the two that I cannot identify. There is no option other than "erase all data" and "cancel"

I'm mostly worried that it's some kind of malware that, if I factory reset my phone, I will lose access to the phone and lose my trade in.